Soul-全流程分析（八）

WebSocket 数据分析

默认配置

@Configuration
@ConditionalOnProperty(name = "soul.sync.websocket.enabled", havingValue = "true", matchIfMissing = true)
@EnableConfigurationProperties(WebsocketSyncProperties.class)
static class WebsocketListener {

    /**
     * Config event listener data changed listener.
     *
     * @return the data changed listener
     */
    @Bean
    @ConditionalOnMissingBean(WebsocketDataChangedListener.class)
    public DataChangedListener websocketDataChangedListener() {
        return new WebsocketDataChangedListener();
    }

    /**
     * Websocket collector websocket collector.
     *
     * @return the websocket collector
     */
    @Bean
    @ConditionalOnMissingBean(WebsocketCollector.class)
    public WebsocketCollector websocketCollector() {
        return new WebsocketCollector();
    }

    /**
     * Server endpoint exporter server endpoint exporter.
     *
     * @return the server endpoint exporter
     */
    @Bean
    @ConditionalOnMissingBean(ServerEndpointExporter.class)
    public ServerEndpointExporter serverEndpointExporter() {
        return new ServerEndpointExporter();
    }
}

DataChangedEventDispatcher

@Component
public class DataChangedEventDispatcher implements ApplicationListener<DataChangedEvent>, InitializingBean {

    private ApplicationContext applicationContext;

    private List<DataChangedListener> listeners;

    public DataChangedEventDispatcher(final ApplicationContext applicationContext) {
        this.applicationContext = applicationContext;
    }

    @Override
    @SuppressWarnings("unchecked")
    public void onApplicationEvent(final DataChangedEvent event) {
        for (DataChangedListener listener : listeners) {
            switch (event.getGroupKey()) {
                case APP_AUTH:
                    listener.onAppAuthChanged((List<AppAuthData>) event.getSource(), event.getEventType());
                    break;
                case PLUGIN:
                    listener.onPluginChanged((List<PluginData>) event.getSource(), event.getEventType());
                    break;
                case RULE:
                    listener.onRuleChanged((List<RuleData>) event.getSource(), event.getEventType());
                    break;
                case SELECTOR:
                    listener.onSelectorChanged((List<SelectorData>) event.getSource(), event.getEventType());
                    break;
                case META_DATA:
                    listener.onMetaDataChanged((List<MetaData>) event.getSource(), event.getEventType());
                    break;
                default:
                    throw new IllegalStateException("Unexpected value: " + event.getGroupKey());
            }
        }
    }

    @Override
    public void afterPropertiesSet() {
        Collection<DataChangedListener> listenerBeans = applicationContext.getBeansOfType(DataChangedListener.class).values();
        this.listeners = Collections.unmodifiableList(new ArrayList<>(listenerBeans));
    }

}

WebsocketCollector

@Slf4j
@ServerEndpoint("/websocket")
public class WebsocketCollector {

    private static final Set<Session> SESSION_SET = new CopyOnWriteArraySet<>();

    private static final String SESSION_KEY = "sessionKey";

    /**
     * On open.
     *
     * @param session the session
     */
    @OnOpen
    public void onOpen(final Session session) {
        log.info("websocket on open successful....");
        SESSION_SET.add(session);
    }

    /**
     * On message.
     *
     * @param message the message
     * @param session the session
     */
    @OnMessage
    public void onMessage(final String message, final Session session) {
        if (message.equals(DataEventTypeEnum.MYSELF.name())) {
            try {
                ThreadLocalUtil.put(SESSION_KEY, session);
                SpringBeanUtils.getInstance().getBean(SyncDataService.class).syncAll(DataEventTypeEnum.MYSELF);
            } finally {
                ThreadLocalUtil.clear();
            }
        }
    }

    /**
     * On close.
     *
     * @param session the session
     */
    @OnClose
    public void onClose(final Session session) {
        SESSION_SET.remove(session);
        ThreadLocalUtil.clear();
    }

    /**
     * On error.
     *
     * @param session the session
     * @param error   the error
     */
    @OnError
    public void onError(final Session session, final Throwable error) {
        SESSION_SET.remove(session);
        ThreadLocalUtil.clear();
        log.error("websocket collection error: ", error);
    }

    /**
     * Send.
     *
     * @param message the message
     * @param type    the type
     */
    public static void send(final String message, final DataEventTypeEnum type) {
        if (StringUtils.isNotBlank(message)) {
            if (DataEventTypeEnum.MYSELF == type) {
                try {
                    Session session = (Session) ThreadLocalUtil.get(SESSION_KEY);
                    if (session != null) {
                        session.getBasicRemote().sendText(message);
                    }
                } catch (IOException e) {
                    log.error("websocket send result is exception: ", e);
                }
                return;
            }
            for (Session session : SESSION_SET) {
                try {
                    session.getBasicRemote().sendText(message);
                } catch (IOException e) {
                    log.error("websocket send result is exception: ", e);
                }
            }
        }
    }
}

WebsocketDataChangedListener

public class WebsocketDataChangedListener implements DataChangedListener {

    @Override
    public void onPluginChanged(final List<PluginData> pluginDataList, final DataEventTypeEnum eventType) {
        WebsocketData<PluginData> websocketData =
                new WebsocketData<>(ConfigGroupEnum.PLUGIN.name(), eventType.name(), pluginDataList);
        WebsocketCollector.send(GsonUtils.getInstance().toJson(websocketData), eventType);
    }

    @Override
    public void onSelectorChanged(final List<SelectorData> selectorDataList, final DataEventTypeEnum eventType) {
        WebsocketData<SelectorData> websocketData =
                new WebsocketData<>(ConfigGroupEnum.SELECTOR.name(), eventType.name(), selectorDataList);
        WebsocketCollector.send(GsonUtils.getInstance().toJson(websocketData), eventType);
    }

    @Override
    public void onRuleChanged(final List<RuleData> ruleDataList, final DataEventTypeEnum eventType) {
        WebsocketData<RuleData> configData =
                new WebsocketData<>(ConfigGroupEnum.RULE.name(), eventType.name(), ruleDataList);
        WebsocketCollector.send(GsonUtils.getInstance().toJson(configData), eventType);
    }

    @Override
    public void onAppAuthChanged(final List<AppAuthData> appAuthDataList, final DataEventTypeEnum eventType) {
        WebsocketData<AppAuthData> configData =
                new WebsocketData<>(ConfigGroupEnum.APP_AUTH.name(), eventType.name(), appAuthDataList);
        WebsocketCollector.send(GsonUtils.getInstance().toJson(configData), eventType);
    }

    @Override
    public void onMetaDataChanged(final List<MetaData> metaDataList, final DataEventTypeEnum eventType) {
        WebsocketData<MetaData> configData =
                new WebsocketData<>(ConfigGroupEnum.META_DATA.name(), eventType.name(), metaDataList);
        WebsocketCollector.send(GsonUtils.getInstance().toJson(configData), eventType);
    }

}

ThreadLocalUtil

public class ThreadLocalUtil {
    private static final ThreadLocal<Map<String, Object>> THREAD_CONTEXT = ThreadLocal.withInitial(HashMap::new);

    /**
     * save thread variable.
     *
     * @param key   put key
     * @param value put value
     */
    public static void put(final String key, final Object value) {
        THREAD_CONTEXT.get().put(key, value);
    }

    /**
     * remove thread variable.
     *
     * @param key remove key
     */
    public static void remove(final String key) {
        THREAD_CONTEXT.get().remove(key);
    }

    /**
     * get thread variables.
     *
     * @param key get key
     * @return the Object
     */
    public static Object get(final String key) {
        return THREAD_CONTEXT.get().get(key);
    }

    /**
     * remove all variables.
     */
    public static void clear() {
        THREAD_CONTEXT.remove();
    }
}